Guard.



G. H. DAY,

GUARD.

APPLICATION FILED DEC-26. I917- Patented Feb. 25, 19192 INVENTOH GEORGE. 1- DAY HQFQMSMMW A TTOB/VEYS GEORGE H. DAY, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNORTO AMERICAN OPTICAL COMPANY, OF SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY ASSOCIATION OF MASSACHUSETTS.

GUARD.

Specification of Letters Patent.

Patented Feb. 25, 1919.

Application filed December 26, 1917. Serial No. 208,936.

To all whom it may concern:

Be it known that I, GEORGE H. DAY, a citizen of the United States, residing at Southbridge, in the county of Worcester and State of Massachusetts, have invented cerguards, and has particular reference to a guard lever or the like for use upon a fingerpiece mounting.

One of the leading objects of the present invention is the provision of a novel and im proved guard and process of producing the same particularly adapted for use in connection with gold-filled material, whereby there will be in the-finished article a minimum amount of cuts or selvage edges over which it is necessary to draw the precious metal covering of the filled stock, and consequently which can be manufactured at considerably less expense and-will produce a more satisfactory completed article less liable to have the base metal tarnishable core exposed than is the case with present day stamped out constructions.

A further object of the present invention is the provision of an improved form of combined fingerpiece lever and guard which may if desired be formed from a single continuous piece of round stock, subsequently suitably shaped, and which when so formed will present no cut sides or exposed base metal, and which will consequently be adapted for maximum wear without liability of the edges opening up, exposing the tarnishable base metal.

Other objects and advantages of my improved construction and method of producing the same should be readily apparent by reference to the following specification taken in connection with the accompanying drawings, and it will be understood that I may make any modifications in the details of construction shown and described within the scope of the appended claims without departing from or exceeding the spirit of my invention.

Figure I represents a front view of the mounting embodying my improvement.

Fig. II represents a detail view of one of the first steps taken in the formation of my improved guard lever.

Fig. III represents a similar view in which the parts have been slightly flattened.

Fig. IV represents a view of the parts in practically finished condition.

Fig. V represents a detail view of a blank formed by direct reducing without bending.

Fig. VI represents a sectional view as on the line VI-VI of Fig. IV.

Fig. VII represents a sectional view as on the line VIIVII of Fig. II.

Fig. VIII represents a corresponding sectional View as on the line VIII-VIII of Fig. IV.

Fig. IX is a detailed perspective view of the material before being operated upon to produce the blank illustrated in Fig. V.

In the drawings, in which similar characters of reference are employed to denote corresponding parts throughout the several views, the numeral 1 designates the bridge of an ophthalmic mounting, serving to connect the lenses 2, and provided with the pivot seat 3, on which are secured the spring actuated leve'rs for securing the mounting in position on the face of the wearer.

My present invention relates particularly to the construction of these improved levers.

In Fig. II, I have shown the lever as formed from a piece of round stock having the connecting arm or portion 4: formed at one end into the double loop or bow knot portion 5, and having the opposite end slightly offset as at 6 to form part of the pivot receiving aperture continued forward into the loop 7 and terminating in the reversely extending portion 8 projecting just beyond the offset 6 and preferably slightly offset to aid in forming in connection with ing or flattening operations, producing first the form shown in Fig. III for example in flattened as is illustrated in the sectional view, Fig. VI, and the other parts correspondingly shaped and flattened. During this operation the overlapping jointsor the like will be blended to form a single continuous appearing strip of material, while theedges will maintain their original round form, and the stock on the edges will be even heavier than that on the side so that there is absolutely no possibility of the edges wearing through under ordinary service conditions.

As an alternative form of construction I haveillustrated in Fig. V the formation of a lever adapted to have a guard pivoted to the head 10. In this form an originalpiece of round wire or material is put through a series of reducing operations to narrow it, as at 11, and between the pivot enlargement 13 and head 10 and leave the wide stock, as at 12 and 13, the stock being then flattened and pierced to produce the lever arm shown in Fig. V, which will have the cut portion only at its ends 14 and 15, the stock being preferably cut in such manner that the subsequent operation will draw or force the precious metal shell over to securely close up and conceal these ends, while the remaining edges will be in their original rounded and uncut form, thus providing a seamless and uncut blank for the lever with all edges tho-roughly protected.

I claim: v

1. A lever for a fingerpiece mounting or the like formed from round material having to provide a guard member at one end and I a fingerpiece handle. and pivot bearing on the opposite portion, said material havlng its ends secured to the body and having the guard and handle portions at least flattened into thin or plate-like formation, said fiattening preserving the original rounded edges of the material whereby a seamless filling covers the entire edges of the lever and prevents exposure of the core or filling material. V

4. The process of forming a guard arm or the like, consisting in suitably shaping a seamless blank and subsequently flattening predetermined portions of the blank to substantially plate-like formation while preserving the original covering for the edges of the plate, substantially as and for the purpose described.

In testimony whereof I have affixed my signature, in presence of two witnesses.

GEORGE DAY.

Witnesses:

WM. P. CHASE, WILLIAM B. JoNEs.

Copies of this patent may be obtained for five cents each, by addressing the G'ommissiozir of Patents,

Washington, I). 0. 

